Grooved phaco-emulsification needle

Details Grooved phaco-emulsification needle Grooved phaco-emulsification needle

A - Human Necessities

61

F

A61F 9/00 (2006.01) A61F 9/007 (2006.01) A61B 17/32 (2006.01) A61M 1/00 (2006.01)

Patent

CA 2198259

A phase-emulsification needle (20) is provided for use with a plastic or elastomeric sleeve (17), the needle having a mid-region portion defining a plurality of outwardly extending projections (24) forming longitudinally-oriented grooves (30) that provide adequate irrigant flow rates to the anterior chamber of the eye, even when the entry wound compresses the sleeve (17) against the outer surface of the needle (20), thereby reducing the risk of collapse of the anterior chamber due to inadequate irrigant flow and reducing the risk of excessive heat transmission to the entry wound.

On décrit une aiguille de phako-emulsification (20) qui s'utilise avec un manchon plastique ou élastomère (17). Cette aiguille présente une partie intermédiaire qui définit plusieurs saillies tournées vers l'extérieur (24) et formant des rainures longitudinales (30) qui amènent dans la chambre antérieure de l'oeil des débits de fluide d'irrigation appropriés, même quand la lésion d'entrée comprime ce manchon (17) contre la surface externe de l'aiguille (20), ce qui réduit le risque d'effondrement de cette chambre antérieure, dû à un débit insuffisant de fluide d'irrigation, et le risque de transmission excessive de chaleur vers la lésion d'entrée.

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